| Index: src/type-info.cc
 | 
| diff --git a/src/type-info.cc b/src/type-info.cc
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| index 4069c83d5749046a5c3ace31d9aab3f19ab6ea77..1940601c4782dd157d8cb773c3de71aae7034fb2 100644
 | 
| --- a/src/type-info.cc
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| +++ b/src/type-info.cc
 | 
| @@ -275,6 +275,8 @@ TypeInfo TypeFeedbackOracle::BinaryType(BinaryOperation* expr) {
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|          return TypeInfo::Integer32();
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|        case TRBinaryOpIC::HEAP_NUMBER:
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|          return TypeInfo::Double();
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| +      case TRBinaryOpIC::BOTH_STRING:
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| +        return TypeInfo::String();
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|        case TRBinaryOpIC::STRING:
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|        case TRBinaryOpIC::GENERIC:
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|          return unknown;
 | 
| 
 |